US1000846A

US1000846A - Means for cooling dynamo-electric machines.

Info

Publication number: US1000846A
Application number: US53193309A
Authority: US
Inventors: Herman Roos
Original assignee: General Electric Co
Current assignee: General Electric Co
Priority date: 1909-12-08
Filing date: 1909-12-08
Publication date: 1911-08-15
Anticipated expiration: 1928-08-15

Description

H. RODS.

MEANS FOR 000mm DYNAMO ELEGTRIG MACHINES.

APPLICATION FILED DEC. 8, 1909.

Patented Aug. 15, 1911.

JZSZSZENTUR HERA IAN B005. 3932 a J/IZZTNE'SEES;

iininii STATES PATENT oFFior..-

A CORPORATION OF NEVV'YORK.

MEANS CCOLING DYNAI1E0-ELECTRIC MACHINES.

To all whom it may concern:

' Be it known that I, Hninunn Boos, a subject' of the Emperor of Germany, residing at Berlin, G-ennany, have invented certain new and useful Improvements in Means for whereby the heat generated during their operation may be carried away in a quick and effective manner.

present invention relates to a cooling that described machines such as means for dynamo-electric in my Patents Nos. 957,102,

and 957,103, dated May a, 1910.

1 .In' my patents abovereferred to, the stator oi the dynamo-electric machine has radial inlet and outlet spaces connected by axial channels, and the stream of air which is i conveyed to and from eachof the axial channels in the stator is not separated from the streams flowing to and from the adjacent axial channels. In certain cases this might lead to anunequal distribution of the air because of eddy currents so that certain axial channels receive a larger amount of air than others,' and thus the cooling eiiect'will not be the same in different parts of the machine.

According to my present invention the space blocks in the radial ventilating spaces form channels separated from each other so that the stream of cooling fluid in each channel in the radial spaces has a path through sthe axial channels which is completely closed against the other currents of cooling fluid,

an'dficonse uentl' the different currents do not interfere with each other.

My invention further consists in certain novel" features of construction which will be pointedoutwith particularity in the claims ppended toand forming a part of this specification. 1

For a better understanding of my invention reference may be had to the following detailed description taken in connection with the accompanying drawing, in which Figure l is a cross-section of a dynamoelectric machine embodying my invention on the lines; 1-1 and 1--1 of Figs. 2 and 3,

I respectively; Fig. 2 is a vertical section on the line 22 ofFig. 1; and Fig. 3 is a sum- Specification of Letters Patent.

Application filed December 8, 1909.

Patented Aug. 15, 1911, Serial No. 531,933.

lar section on the line 3-3.' For the sake of clearness, in Fig. 1 the intersection of the space blocks by the lines 11 and 1*"1 has been omitted.

Referring to the drawing, the laminations are divided into bundles separated by radial inlet and outlet ventilating spaces 2 and :2. These ventilating spaces are connected together by the axial channels 3 formed in the bundles of laminations.

5, 5 are coils of the stator windings and 6 the cast iron casing of the stator.

The radial inlet ventilating spaces 2 are connected with the inlet chambers 9 formed in ,the using and the radial exit ventilating spaces are connected with the outlet chambers 10 also formed in the casing. The latter chambers have openings'8 and are separated from the inlet chambers by ribs 7. In the embodiment of my invention shown in the drawing there are six inlet chambers 9 and six outlet chambers 10 which are distributed uniformly and alternately about the periphery oi the stator in an axial direction. In each of the radial inlet spaces 2 there are formed inlet channels 11 which are separated from each other by suitably formed space blocks 12. These inlet channels 11 are closed on' the inner periphery of the stator by means of space blocks 13, so that no air from the air gap or from the rotor can pass into the inlet channels and thereby cause disturbances in the flow of air. The'end of each channel 11 which is closed against the rotary member communicates with one of the axial channels 3 and thus serves fox-supplying air to only one axial channel. After,

flowing through the axial channel the air passes into one of the outlet channels .14 in the outlet ventilating spaces 2. The outletchannels 14 are separated from each other as are the inlet channels ll by means of specially formed space blocks 12. These exit HERMAN races, on BER-LIN, GERMANY, ASSIGNOR T0 GENERAL ELECTRIC COMPANY,

' and the discharge channels are of unequal length. 'Since the inlet channels 11 and outletschannels '14: are shifted into different outlet channels. Such anarrangement may also-be used in connection with an arrangement in which short and long channels are connected together. The air outlet spaces 2 and the channels 14: therein are not closed on the inner periphery of the stator, but are separated from the inlet chambers by means of members 15, which stretch over the entire arc included by the inletchambers.

The cooling air is drawn from the exterior of the machine into entrance chainbers 16 situated at both. ends of the machine, by fans 17 and driven against the coils 5, from there to the inlet chambers 9, thence through the inlet channels 11 in the inlet spaces 2, through the axial channels 3, through the exit channels let in the exitspaces 2, and into the exit chambers 10, passing from there through the openings 8 into the open air.

The terms stator and rotor are used throughout the specification in their broad sense of stationary and rotary members.

In the particular construction shown, each inlet and outlet channel communicates with a single axial channel, but this is not necessary,and I desire it to be understood that my invention is not limited to the particular construct-ion shown and described, and aim in the appended claims to cover all modilications which do not depart from the spirit of my invention.

\Vhat Iclaim as new and desire to secure by Letters Patent of the United States, is:

1. In a dynamo-electric machine, a stationary laminated core body having radial inlet and outlet ventilating spaces and axial channels connecting said spaces, a casing having axially extending inlet and outlet chambersdistributed alternately about the periphery of said core bndy, and space blocks in said ventilating spaces forming channels separated from each other, said channels in the inlet spaces connecting with the inlet chambers and said channels in the outlet spaces connecting with said outlet chambers.

2. In a dynamo-electric machine, a stationary laminated core body having inlet and outlet ventilating spaces and axial channels connecting said spaces, a casing .having axially extending inlet and outlet chambers distributed alternately about the periphery of said core body, separating blocksto close the outlet ventilating spaces against the inlet chambers,- and space blocks in said ventilating spaces forming channels separated from each other, said channels in the inlet spaces connecting with the inlet chambers and said-channels in the outlet spaces connecting with said. outlet chambers.

In a dynamo-electric machine, a stationary laminated core body having .inlet and outlet' ventilating spaces and axial channels connecting said spaces, a casing having axially extending inlet and outlet chambers distributed alternately about the periphery of said core body, separating blocks to close the outlet ventilating spaces against the inlet chambers, space blocks for closing the inlet ventilating spaces on the inner periphery of the core body, and space blocks in said ventilating spaces forming channels separated from each other, said channels in the inlet spaces connecting with the inlet chambers and said channels in the outlet spaces connecting with said outlet chan'ibers.

St. In. a dynamo-electric machine, a casing having; a plurality of inlet chambers and a lurality of outlet chambers, a stationary laminated core body having radial inlet and outlet ventilating spaces and'a-xial channels connecting said spaces, said inlet and out let chambers being distributed alternately about said core body, and space blocks in the ventilating spaces' forming channels separated trom each other, said channels in the inlet spaces communicating with the inlet chambers and said channels in the' outlet spaces communicating with said outlet chambers. I

5. In a dynamo-electric machine, a casing having a plurality of inlet chambers and a plurality of outletchambers, a stationary laminated core body having radial inlet and outlet ventilating spaces and axial channels connecting said spaces, said inlet and outlet chambers being distributed alternately about said core body in an axial direction, and space blocks in the ventilating spaces forming channels separated from each other, said channels in the inlet spaces communicating with the inlet chambers and said channels in the outlet spaces communicating with said outlet chambers, said space blocks completely closing the path of the stream of cooling fluid in each channel in the radial spaces to each of the axial channels against the other currents of cooling fluid. v

6. In a dynamo-electric machine, a casing having a plurality of inlet chambers and a plurality of outlet chambers, a stationary' vabout said core body, and space blocks in channels and shorter inlet channels with 10 the'ventilating spaces forming inlet and outlonger outlet channels.

let channels of different lengths and sepa- In Witness whereof, I have hereunto set yated. fro'meach other, said channels in the my hand, this 18th day of November, 1909. 5 1nlet spaces communicating with the inlet chambefsand said channels in the outlet HERMAN ROOS' xsfiaces 'co'mlnunicating with said outlet W'itnesses: c ambers, 583d axial channels connecting KARL SULZBERGER,

longer 'inlet channels with shorter outlet Tnnonon SAHRIG.